Home / 12,945.22-17,865.06-7,639.92

Finding the Fourth Proportional to 12,945.22, 17,865.06 and 7,639.92

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Solution

The fourth proportional to 12,945.22, 17,865.06 and 7,639.92 is: 10,543.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.22 : 17,865.06 = 7,639.92 : x
  2. Step 2: Convert to fraction form
    12,945.22/17,865.06 = 7,639.92/x
  3. Step 3: Cross multiply
    12,945.22x = 17,865.06 × 7,639.92
  4. Step 4: Simplify right side
    12,945.22x = 136,487,600.55
  5. Step 5: Solve for x
    x = 136,487,600.55/12,945.22
  6. Step 6: Final answer
    x = 10,543.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.